Telephone system



Od. 8, l940 HERMANNQERNST voN KNxG 2,217,034

TELEPHONE SYSTEM 4 Filed Feb. 3,v 1938 2 Sheets-Sheet l T1 vw lsw II'GW Inew Lw T2 B2b Cu C M FIG. 2

Lem MC1 Cm A M# fmt Lc10 C10 7 Lc21 #C21 CH2 45 Lc22 MACCZZJWL` Lcso ,Meso Lx cha 62Ch4 14ch1 c1 C10 C21 y 1NvE1\rToR.I HERMAN ERNST voN KNIG ATTORNEY.

0d.l 8, 1940 HERMANN-ERNST voN KNIG 2,217,084

TELEPHONE SYSTEM I Filed Feb.'` s, 1938 2 sheets-sneer 2 FIG. 2a

La L .L LG2 M Y l ,INVENTOR HERMAN ERNST VON KONIG ATTORNEY.

Patented Oct. 8, 1940 Pmlarrr OFFICE TELEPHONE SYSTEM Hermann-Ernst von Knig, Berlin-johannisthal, Germany, assignor to Siemens & Halske Aktiengesellschaft, Wemerwerk, Siemensstadt, near Berlin, Germany Application February 3,

193s, serial No. iss-,43o

In Germany February 24, 1937 14 Claims.`

The present invention relates to circuit ar-.,

rangements for telephone systems employing regs isters. Depending upon the form of the network in which the registers are to be employed it may l be necessary when setting up particular calls to cause the register to transmit additional impulse trains. In particular cases the number and the value of the initial impulse trains must be determined in accordance with the setting of the switches over which the register has been reached.

The present invention sets out the way of constructing a register so that in accordance with the seizure of the register over one or the other of a plurality of approaches not only is the number of the impulse trains to be automatically transmitted determined but also the value of these.

The number of the additional impulse trains to be transmitted can be varied at Will without having to make any alterations in the assessor switches of the register.

The invention resides in that in accordance with the seizure of one or other of a plurality of approaches .associated with a vregister markings are eiected both in the contact iield of theA assessor switch of the register for determining the value of additional impulse trains to be transmitted and also in the control switch for determining the number of additional impulse trains to be transmitted. By the process of marking the control switch in accordance with the seizure of one or other of the approaches the number of additional impulse trains to be transmitted can bP varied within wide limits and thus a consideraole elasticity is imparted to the network.

A further characteristic of the invention resides in the manner of arranging the characterizing means in the approaches and in the manner of eecting the marking in a multiple ileld of the assessor which is provided in common with the register switches.

Embodiments of the invention are represented in the drawings but the invention is not limited to these embodiments. Fig. 1 shows a layout of a telephone system employing a register R equipped according to the invention. Figs. 2 and 2a when placed side by side with Fig. 2 to the left of Fig. 2a, show the detailed circuit arrangements of the register R.

Referring now particularly to Fig. l, it will be seen that the register R cooperates with a re-I peater Ue and may bereachedover any of a plurality of approaches.k If the register R is seized over the group selector lGW a single impulse train is automatically transmitted for setting the selector IIIGWi while the other impulse trains required for setting up the call are taken up by the register R and are transmitted again either translated or if necessary untranslated. 5 The value of the additional impulse trains to be transmitted can be determined in accordance with the level over which the register R was seized by the group selector IGW. In such a case the digits serving to set the selector IGW are rel0 peated automatically by the register R.

If the register R is seized over/ a levelbf the second group selector IIGW two impulse trains are automatically transmitted before the transmission of the impulse trains transmitted by the 13 calling station and registered in the register R. In the case, of this transmission also the value of the levels of the switches IGW and IIGW over which the register was seized can be characterized in the register so that the impulse trains transgo mitted by the latter correspond in value to the digits which served t0 set the switches IGW and IIGW.

When the register R is seized over the third group selector IIIGW three impulse trains are 25 automatically transmitted before the digit registered in the register. When the register R is seized over the group selector GWi no automatic transmission of impulse trains takes place but merely the registration and retransmission of the 30 impulse'trains transmitted by the calling station. Naturally if necessary translation can take place or the number of impulses can be changed or corrected. y

Fig. 2 represents the details of the register R g5 indicated in the Fig. l. St represents a control switch having wipers ist, 2st, 3st and est and contacts 5st and 6st associated with it. The wipers lst-list are advanced in steps when the rotary magnet St is operated. Contacts 5st and @e 5st are closed each time the magnet St energizes and opened again when it deenergizes. Ab indicates the rotary magnet oi' an assessor with which are associated the wipers lab, 2ab, ab and dab. ZI, Z2, Z3 and Z4 indicate the mag- 45 nets of switches which serve to lreceive the impulse trains transmitted by the calling station. Four wipers are associated with the individual switches ZI-Ztand advance in steps on the operation of the corresponding magnets. In addition these switches possess off-normal contacts Asl-424 which are closed each time the associated magnet energizes and are opened again when this deenergizes.

The seizure of the register takes place over Furthermore in accordance with the seizure of one of these approaches a contact is marked in the bank associated with wiper l st of the control switch St for the purpose of determining the number of additional impulse trains to be transmitted.

If there is no additional transmission o1' impulses required on the seizure of the register the latter must take place over the approach Lz. In this case switching operations takeplace (at contacts 55ch3 and 6lch3) which prevent additional impulses from being transmitted.

In the individual approaches to the register relays Cl to Cl0, C2l to C30, Chl, Ch2, Chi and Chl are arranged which determine the mode of operation of the register. Naturally in place ol.' these relays switches could be used which would hunt for the approach seized after the seizure of the register and would eilect corresponding markings in the multiple eld VL of the register and at the contacts associated with wiper lst of the control switch.

The establishment of a connection will now be explained with reference to the arrangement shown in Fig. 2. The register will be assumed to have been seized over lead Lc2II. This corresponds in Fig. 1 to the register being seized over the group selector IIGW and over the second level of this. Two impulse trains are automatically transmitted from the register the iirst impulse train being "Five and the second Tw`0. It will be assumed that the group selector IGW has reached the group selector IIGW over the level 5. Those digits therefore which were selected in order to reach the register are repeated by the register. It will be understood, however, that according to the manner in which the system is arranged other digits could be arranged to be repeated by the register, the value of the individual digits being determined by the markings in the multiple eld VL.

When the register is seized over the approach Lc2II the relays C2 (winding 1I), Chl, Cu and C are operated. The register is guarded by switching means in the preceding group selector in known manner. Relay S energizes over its windings I and II in the leads La and Lb over the speaking wipers of the seizing group selector. Relay S operates its contacts and at contact 4s breaks the circuit for relay A before relay Cu closes contact 20u. Contact 3cu connects earth to the outgoing line Lc2 thereby seizing succeeding devices. 'I'hrough the energizing of relay C contacts 54e, 55c and 5Bc are opened without ef-""r fecting any switching operation. In addition contacts llic, l'lc and 5lc are also operated and similarly do not evoke any switching operations. Through the energizing of relays C2 and Chl on the seizure of the register the contacts ilc2, |202, l3chl, llchl and l5chl are operated. On

I the closing of contact 5c the following circuit is tact 91 earth is applied to lead LaZ over contact 28ph2 whereby succeeding numerical impulse receivers, which are not shown, receive the ilrst lmpulse. Contact 17' energizes winding I of relay O. Contact 07' effects the energizing of magnet Ab so that the wipers lab, 2ab, 3ab and lab are advanced one step. Over contact |00 relay J is short-circuited and releases. The ilrst impulse which was transmitted over contact 97' is now terminated. The opening of contact 87 is not effective as regards lead Lb2 since wiper lab maintains the connection of earth. Through the opening of contact 17' relay O is. deenergized. Contact lilo restores to normal, whereupon relay J energizes again and while advancing the assessor Ab transmits an impulse over the lead La2 over contact 07'. lThe earth serving to energize relay J during the further stepping of the assessor is applied over the segment traversed by wiper 2ab of the assessor. Winding II of relay O is short-circuited over contact 29p so that relay O is made slow-to-operate thus limiting the duration of the succession of individual impulses transmitted over the line La2. 'I'he relays J and O operate in rhythm while advancing the assessor. When wiper Sab reaches contact 5 the following circuit is established for relay P: earth, battery, windings II and I of relay P, wiper Sab in position 5, multiple ileld VL, contact l5chl, contact O of the control switch wiper lst, contact l6c and earth. Relay P energizes and prevents the transmission oi further impulses. Since relay P energized after the fifth step of the assessor Ab ve impulses have been transmitted over the outgoing line. A locking circuit for winding II of relay P is completed by contact |917. This passes from earth over wiper 4ab of the assessor Ab, contact lp and winding II of relay P to battery and earth. Contact 2lp switches on relay Phl and contact 22phl switches on relay Ph2. The contacts 25ph2 and 26ph2 are opened so that relay J is now no longer caused to deenergize through being short-circuited but -stands under the direct control of contact |00. Contact 29p breaks the short-circuit across winding II of relay O so that relay O in association with relay J which is now controlled directly operates at a more rapid ratethan during the preceding impulse transmission. Any further transmission of impulses over the line La2 is prevented'after the operation of relay P by the opening of contact 28phl. Relay J operates relay O again over contact 17', whereupon relay O interrupts the energizing of relay J by switching over contact |00. During this operation of relays J and O the assessor Ab is advanced over contact G7' until the Wipers of this switch reach position 0. In this position relay P is deenergized since the locking circuit for winding 1I of relay P is broken at wiper lab in position 0. On the release oi relay P the circuit for relay Phl is opened at contact 2lp.

Relay Phl, however, is a slow to release relay and makes adelayed release. Accordingly before relay Phl has released the following circuit is set up for magnet St of the control switch. Earth, contacts l 1c, |811, 21phl, control switch magnet St, battery and earth. 'I'he control switch St is A I advanced one step. On the release of relay Ph2 the following circuit is established for relay J: earth, contacts 6lch3, 5c, 23ph2, wiper 2st of the control switch St in position 2, wiper 2ab of the assessor in position 0, contact-25ph2, relay J, re- 'sistance W52, battery and earth. Relay J energizes and operates relay O (winding I). At GOutct 87 a control potential is again applied to the line Lb2 and over contact .9j the first impulse of the second additional impulse train to be transmitted is sent out from the register. The release periods of relays Phi and Ph2 after the assessor has been restored to normal are such that a succeeding switch has suiiicient time, while hunting freely to find a line. The stepping of the assessor Ab now proceeds in the same way under the control of relays J and O as has been described in connection with the transmission of the rst impulse train. When during its stepping wiper Sab of the assessor reaches position 2 the following circuit is established after two impulses have been transmitted: earthfbattery, windings II and I of relay P, wiper 3ab of the assessor in position 2, lead 2 of the multiple field VL, contact |2c2 of relay C2, contact i3chi, contact I in the bank of the control switch wiper ist, contact I6c and earth. Relay P locks up over contact |911 and energizes relay Phi over contact 2 ip. Relay Phi energizes relay Ph2. Contact 28ph| prevents the transmission of further impulses over contact 97'. The further stepping of the assessor to position takes place in the same way as described in connection with the transmission of the first impulse train in that after the opening of contacts 26ph2 and 25ph2 relay J is directly controlled by contact |00 of relay O. When the assessor Ab reaches position 0 the earth connected to the lead Lb2 is disconnected at wiper lab. Moreover, at wiper 4ab the circuit for winding II of relay P is broken. Relay P releasesand closes contact i8p. The following circuit is established for magnet St before relay Phi releases: earth, contacts ile, |8p, 21pm, magnet St, battery and earth. Accordingly the wipers ist, 2st, 3st and 4st areI advanced one step so that they now occupy position 2. Since now no further additional impulses are to be transmitted the control switch St is advanced before the assessor Ab becomes operative. In position 2 of the control switch St the following circuit is completed for relay P before relay Phi releases: earth, battery, windings II and I of relay P, contact 6st of the energized magnet St, contact 30ch2, contact 2 in the bank of the control switch wiper ist, contact Iiic and earth.

Relay P energizes and maintains relays Phi and Ph2 energized. At contact |81) it opens the energizing circuit of magnet St. Magnet St releases and opens contacts 5st and 8st. On the opening of contact 6st relay P releases. By closing contact ip relay P energizes the control switch magnet St again whereupon the control switch passes to positionf. In this position relay P energizes over the closed contact 6st and causes the control switch magnet to release by opening contact iBp. Contact .6st is opened so that relay P releases again and switches on the control switch magnet St over contact Ip. The control switch accordingly takes a further step forward and passes to position 4. Contact 6st is closed but does not cause relay P to energize. RelayP thus remains deenergized for a prolonged period so that relays Phi and Ph2 also release. The magnet St similarly releases and opens oontacts 5st and 6st. The repetition of the digits for setting the'group selectors IGW and IIGW, assumed to be 52 in the present example, is thus terminated. During the impulse repetition just described the calling subscriber will in most cases have already dialled the further `digits of the wanted call number. These impulses` are taken up by the relay S connected to the leads La and Lb. On each impulse relay S releases whereupon contact Is each time closes a circuit for re' lay A. Relay A operates its contacts and at thel first impulse of a train energizes relay V over its windings I and II by closing contact 33a. Relay the first impulse train is ended contact 33a is opened for a prolonged period. This causes the release of relay V. When relay V releases the following circuit is set up for relay Ui over contact 3912: earth, contacts 24e, 39.11, wiper 22| of the meter switch ZI, winding I of relay Ui, battery and earth. In this circuit relay U| energizes. The metering switch Z2 isv connected to the impulse contact 34a over contact 3'iui.

Qn the first impulse of the second impulse train relay V is energized again. Relay UI does not release when contact 390 is switched over since it remains energizedover winding II in the -following circuit: earth, battery, winding l1 of relay Ui, contacts 4Iul, 45143, wiper 224 of the metering switch Z4 in position 0, contact 24e, and earth. If the metering switch Z2 has been setf by transmitting for example the digit 6, then on the termination of this impulse train relay U2 be` comes energized through the release of relay V. This circuit passes from: earth, over contacts24c, 39u, wiper 222 in position 6, contact 4ilui, winding I of relay U2 to battery and earth.

Relay U2` energises and at contact 36u2 switches on the meter Z3. On the commencement of the third impulse train transmitted to the register sender V is energized again, whereupon a locking circuit for winding II of relay U2 is established over earth and contacts 24e, 39u, 45u3 and 44u2. After the setting of the metering switch Z3 for example by the digit 'l relay V releases again because contact 33a remains open fora prolonged period. Contact 3911 now enerover contact 35u3. At contact 45u3 it establishes a looking circuit for winding II of relay U3. The last impulse train transmitted to the register from a calling station, comprising for example eight impulses, passes to the switch Z4. On the first impulse of this train relay V is energized again whereby contact 39o is switched over. Accordingly a fresh locking circuit for winding II of relay U3 is completed over contact 45u3. The metering switch Z4 receives the impulses transmitted from the calling station and in accordance with the eight impulses transmitted is set in position 8. After the end of this,l impulse train relay V releases, whereupon contact 39u assumes its rest position. 'I'he relays Uii U2 and U3 are now held energized over earth and contacts 24e and 3912 and the operated wipers 22| ,222 and 223.

As already described, the control switch after automatically transmitting the impulse trains 5 and 2 passes into position 4. Having reached this position, provided the metering switch ZI is already set, the following circuit is established forrelay J: earth, contacts 6|ch3, 5c, 23ph2 and 46sp, the contact bank of wiper |2| of the switch ZL, wiper |2| in position 5, contact 4, in the bank associated with Wiper 2st of the control switch St, contact O of wiper 2ab oi' the assessor Ab, contact 25ph2, relay J, resistance Wi2, battery and earth. Relay J commences to cooperate with relay O in the manner already described in order to step the assessor Ab and to transmit impulses. The impulse train registered in the switch ZI is transmitted over contact 97'. When wiper 3ab of the assessor reaches contact 5 the following circuit is set up: earth, contact IGc, wiper Ist of the control switch St in position 4, wiper 32| of the switch ZI in position 5, the lead in the multiple field VL, wiper 3ab of the assessor in position 5, windings I and II of relay P, battery and earth. Relay P energizes and energizes relay PhI. Relay PhI by opening contact 28ph| terminates the outgoing impulsing over the line La2. The contacts 26ph2 and 25ph2 are opened. Further stepping of the assessor now takes place under the direct control of relay J over contact of the relay O which is now no longer slow in its operation so that after the energizing of relay P the assessor is advanced at a more rapid rate to position 0. When it has reached this position the circuit for relay P is broken at wiper 4ab. Relay P releases and over contacts IIc, IBp and Z'Iphl sets up a circuit for the control magnet St. The control magnet St energizes and advances the wipers of the control switch to position 5. When now relay PhI releases the control switch magnet St is deenergized. In position 5 of the control switch the following circuit is established for magnet ZI over wiper 3st: earth, interrupter Un, wiper 3st, contact 5 of wiper 3st, wiper 32|, winding of magnet ZI, battery and earth. In this circuit the switch ZI is advanced until wiper 32| and thus also the switch ZI have reached the zero position. On the release of relay Ph2 relay J energizes in the following circuit over contact 23ph2: earth, contacts 6Ich3, 5c, 23ph2, and 46sp, contact bank of wiper |22, wiper |22 in position 6, contact 5 associated with wiper 2st, wiper 2st, wiper 2ab, contact 25ph2, relay J, resistance Wi2, battery and earth. In cooperation with relay O relay J advances the assessor Ab and transmits impulses in the manner previously described. When wiper Sab of the assessor Ab reaches position 6, the following circuit is established for relay P: earth, contact I6c, wiper Ist, contact 5, wiper 322 in position 6, wiper Sab in position 6, windings I and II of relay P, battery and earth. Relay P energizes and energizes relays PhI and Ph2. At contact 28ph the transmission of impulses is interrupted. The further stepping of the assessor Ab proceeds in the manner already described until the zero position is reached. In this position the locking circuit over winding II of relay P is broken at wiper 4ab whereupon the control switch is advanced into position 6 over contact I8p in the manner already described. After relay Ph! has released relay J is subjected to current over wiper |23 of the metering switch Z3 and wiper 2st of the control switch in position 6 and in cooperation with relay O advances the assessor Ab and transmits impulses. When the assessor reaches position 7 the following circuit is established over wiper 323: earth, contact IIc, wiper Ist, contact 6, wiper 323, position'7, wiper 3ab in position 7, windings I and II of relay P, battery and earth. By energizing relay PhI relay P terminates the transmission of further impulses over the line La2 because contact 28ph| is opened. Relay J becomes energized over: earth, the contact bank associated with wiper Zab and contact |00 and in cooperation with relay O switches the assessor Ab into position 0. In this position relay P is again caused to deenergize. The control switch receives an impulse over contact |811 so that its wipers assume the position 7. In this position wiper 334 is switched on. The advancing of the assessor Ab is initiated after the release of relay Ph2 over contact 23ph2 and wiper |214. When the assessor Ab advances its wiper 3ab to position 8, relay P becomes energized over earth, contact |6c, wiper Ist, contact 'I associated with Wiper St, wiper 324 in position 8, wiper 3ab in position 8, relay P (windings I and II) battery and earth. Relay P is operated and by energizing PhI terminates the transmission of impulses over line La2. Relay J energizes over: earth, wiper 2ab and contact |I|o and in cooperation with relay O causes the assessor Ab to be advanced to the zero position in the manner previously described. In this position relay P releases because its locking circuit is opened at contact 4ab. The control switch St receives an impulse over earth and contacts 6|ch3, 5c, I 8p and 21pm whereupon it passes into position 8. Relay PhI releases. Relay J is no longer energized because earth is not connected to contact 8 of wiper 2st.

When the wiper 3st is set in positions 6, 'Tand 8 the switches Z2, Z3 and Z4 release in the manner which has already been described in the case of the switch ZI when the wiper 3st Was set in position 3.` The control switch St is only set in the rest position on the release of the connection and the deenergizing of relay C. When the connection over the leads La and Lb is released the seizing potential which is connected in any known manner to the c-lead of the seizing group selector is disconnected. Accordingly relays C, Cu and the relays disposed in the leads to these relays release. Relay C restores its contacts Yto normal whereby the following circuit is set up for the control switch St: earth, interrupter Un, windings II and I of relay B, contact 5|c, wiper 4st of the control switch St in position 8, advancing magnet St, battery and earth. The interrupter Un now advances the control switch in steps until it has reached the zero position in which wiper 4st breaks the circuit for magnet St.

As has already been stated, when the control switch St was set in position 5 the counting switch Z2 had its setting assessed and the switch ZI was restored to normal. By means of this successive release of the individual switches at the time of the assessing operation it is possible to use the individual receiving switches several times in succession in that the switches ZI, Z2, etc., are again connected to the control switch contacts which lie beyond the contact over which the switch Z4 is influenced.

When the transmission of additional impulse trains is terminated the control switch St occupies position 4 as previously described. In the event of no impulses having been transmitted to theregister meanwhile from the calling station,

.the assessor Ab. If impulses are transmitted animee from the calling station relay A is impulsively operated inthe manner already described and relay V energizes over contact 33a on the iirst impulse. Through the closing of contact 48u a locking circuit is set up for relay Sp which passes from earth over the winding oi relay Sp and contacts lisp and 48u, resistance Wi to battery. This circuit is maintained throughout the impulse train transmitted from the calling station. Contact 4311 is similarly opened so that the earth connected at contact 8 i ch cannot pass to relay J over wiper isi of r,the switch Zi which is now set and no premature advanceof the assessor Ab occurs. The setting of switch Zi is rst assessed after the termination of the impulse train setting this switch in that the following circuit is established for relay J on the release oi' relay V through the closing of contact 43o: earth, contacts 8ich3, 5c, 23ph2, 43u, wiper izi, contact 4 associated with the wiper 2st of the control switch, wiper 2st, wiper Zab, contact 25ph2, relay J, resistance Wi2, battery and earth. Relay Sp releases through the opening of contact 48u. On account of the energizing of'relay J relay 0 is operated whereupon the assessor is advanced in the manner already described. When wiper Bab reaches the position marked at wiper Sei, the circuit already`described for relay P is established. The Y transmission of further impulses is prevented by the energizing of relay Phi. The contacts 25ph2 and 26ph2 are opened so that the assessor Ab moved to the rest position in small steps as already described. When the rest position is reached relay P releases and by opening contact 2i p promotes the release of relay Phi. The control switch magnet St receives an impulse through the closing of contact isp so that thev wipers of the control switch pass to position 5.

If the control switch has reached position 5 and the switchrZ2 has not yet been set. relay Sp energizes again. Contact 48sp is opened and contact lisp closed. No energizing oi relay J and consequent energization of relay O takes place so that the -assessor is not set in operation. I! now impulses are transmitted to the switch Z2 by the calling station the wiper iz2 is advanced. No energizing circuit for relay J is set up for this wiper, however, since on the reception of im-k pulses relay Vis energized as previously described so that contact 43e is opened. Over contact 4817 a locking circuit is set up for relay Sp passing over contact lisp. Only on the termination o! the impulse train setting the switch Z2 is an energizing circuit established for relay J on the release of relay V.

Relay Sp therefore ensures that the energizing circuit for relay J shall be broken so long as impulses are being sent to a counting switch which has been prepared to be assessed by the control switch. The transmission of impulses can accordingly only commence when the counting switch to be seized has terminated its setting.

If the register is seized over one of the approaches Lc2i to Lc30 a relay characterizing the particular approach in this group energizes as well as the group relay Ch2. It for example the seizure takes place over the lead Lc30 the relays C30 and Ch2 energize in the approaches and relays C and Cu in the register as was made clear in the description of the first embodiment. Relay Ch2 operates the contacts 30ch2, 3ich2 and 32ch2. Accordingly in addition tothe marking of the multiple field over contact e30 further markings are made which cause the digit 2 to be transmitted as the first impulse train, the digit 5 as the second impulsetrain and they digit 0 as the third impulse train automatically from the register. These digits correspond to a seizure of the register after the group selector IGW (Fig. 1) has been set on level 2, the group selector IIGW has been set on level 6 and the group selector IIIGW has been set on level ill.-

The assessing operations correspond fundamentally to the operations already described in connection with the seizure of the register over the' group selector IIGW in Fig. 1. The difference resides merely in the number of impulse trains to be transmitted. The operation differing from those already describedwill be described brieily.

After relay C has venergized in the register relay J is energized on the closing of contact 5c over the circuit commencing at contact 6ich3 and passing to relay J over wipers 2st and 2ab. Relay J causes relay O to energize. whereupon these two relays energize and release intermittently and thus transmit impulses over contact 9i. The assessor Ab is advanced through the impulsive operation of contact Si. When the assessor Ab with its wiper Sab reaches the line L2 marked over contact 32ch2 an energizing circuit is established for relay P over wiper ist of the control switch and wiper 3ab of the assessor. Thus the further transmission o! impulses is prevented in the manner previously described. Two impulses have been transmitted. The relays J and O are now switched over so that the assessorv passes rapidly to the zero position. In this position the circuit for relay P is broken at wiper ab and the control switch St receives an impulse which passes over the contact 2'iphi which has not yet released. The control switch passes into position l. When relay Ph2 releases after the release of relay Phi the energizing circuit for relay J is reestablished. Accordingly the assessor is advanced and now hunts for lead B in the multiplel field VL marked over contact 3ich2 in position 1 of the control switch St. When wiper Sab stands on this lead the transmission of impulses is terminated and the assessor Ab is brought to position 0 ata more rapid rate, whereupon through the deenergizlng of relay P the control switch is brought to position 2. Five impulses are transmitted. Relays Phi yand Ph2 release so that the energizing circuit for relay J which has frequently been referred to is established. The assessor now hunts for vthe line in the' multiple ileld VL marked by contact e30 whereupon l0 impulses are transmitted.

When the assessor passes toV position l0 relay P energizes thereby promoting the energization of relays Phi and Ph2. Contact 28phi prevents the transmission of further impulses. Relay J is operated over wiper Zab so that the assessor Ab passes to position 0. In thisposition the circuit for relay P is broken at wiper ab so that the magnet St receives an impulse. The control switchadvances to position 3. Here relay P energizes immediately since earth is connected at contact i6c over control switch contact 3 (wiper ist) over the still closed contact 6st to winding the control switch pass -to position 4. The relay now remains deenergized over a prolonged period so that relay Phi and thereupon relay Ph2 re- 4 lease. Contact 21pm opens the energizing circuit ci the control switch magnet St. In position 4 o! the control switch the setting of the switch ZI is assessed in the manner already described. v

When the register seized over one of the approaches LclI to LcIIII only a single additional impulse train is transmitted. In this case the relays Chl and Ch! remain deenerglzed so that the multiple field VL is connected ,over one oi the contacts of relays CI-Cl only in position of the control switch. In positions 1 and 2 o! the control switch the multiple eld VL is not connected. Accordingly ii' for example the register is seized over the approach LC2I in addition to relays Ca and C only relay C2 energizes when the register is seized. Relay C2 operates contacts |Ic2 and i2c2. The energizing oi relays Cu and C starts an assessor Ab and seizes succeeding devices in the manner previously described. The assessor Ab is advanced through the closing oi contact 5c. When wiper Sab reaches contact 2 relay P energizes in the following circuit: earth, battery, windings II and I oi relay P, contact 2, associated with wiper lab, contacts No2 and lchl, contact O associated with wiper ist, wiper ist, contact llc and earth. Relay P energizes relays Phl and Ph2. The opening of contact 28ph| terminates the transmission of impulses although the assessor Ab is advanced further. When the assessor reaches position 0 relay P releases whereupon the control switch magnet St receives an impulse over contact lap. 'I'he control switch passes to position 1. Here relay P is energized again since in position 1 the following circuit is completed: earth, contact Isc, control switch wiper Ist, contacts 3lch2 and ilchl, contact 6st,V relay P, battery and earth. Relay P energizes and ropens contact isp. Accordingly the control switch magnet St releases and contact 6st is opened. Relay P releases and magnet St receives a fresh impulse over contact lap so that the control switch passes into position 2. In this position relay P energizes again over wiper Ist (position 2) and contacts Bch! and 6st. 'I'he control switch magnet St releases and contact 8st opens. This interaction between the magnet Bt and relay P continues until the control switch has reached position 4. In this position relay P remains deenergized for a prolonged period so that relays Phl and Ph2 also release. When relay Ph2 releases relay J receives current action over: earth, contacts llchl, 5c, 23ph2 and lsp, wiper Izl, wiper 2st in position 4, wiper 2ab in position 0, contacts 25ph2, relay J, resistance Wi2, battery and earth. In cooperation with relay O relay J now advances the assessor while trans-` mitting the impulse train registered in the switch ZI over contact 91. The further switching operations take place in the manner already described.

Ii the register -is seized over the approach La: relays Ch3 and Chl energize in the approaches and relays Cu and C in theregister. Relay Chl makes a delayed operation. Contacts 55ch3 and llcht are operated. No automatic transmission oi impulse trains takes place in this case; On the closing of contact l6c the following circuit is set up: earth, contact Ito, wiper Ist (position 0) contact llchl, windings I and II of relay PI battery and earth. Relay P energizes and energizes relays Phl and Ph2. Contact 6 Ich3isopened and prevents an energizing circuit being established for relay J on the closing oi contact 5c. When relay Phl energizes contact 21ph| is closed thereby preparing ior the stepping of the control switch. When the slow relay Chlenergizes in the meanwhile it completed in turn over said wiper.

closes contact l2chl. Relay Chl is thus released by being short-circuited: Accordingly contact lich) is opened so that relay P releases. Relay P closes contact Ilp whereupon the control switch magnet St receives an impulse over earth and contacts llc, lip and 2lphl. The wipers of the control switch pass into position 2. Contact lst is closed so that relay P energizes again. The control switch magnet St releases through the opening o! contact isp and opens contact 6st whereupon relay P is also deenergized again. The interaction between the relay P and magnet St continues until the control switch St has reached position 4. The stepping of the assessor Ab during the advancing ofthe control switch is prevented since relay Ph2 does not release during the reciprocal operation of relay P and magnet St and accordingly contact 23ph2 remains open. In position 4 of the control switch relay P is kept deenergized for a prolonged time so that relays Phl and Ph2 can release.` The stepping oi the J by closing o! contact 2Iph2 and the digits registered in the switches ZI-Zl are transmitted as already described.

It may be mentioned that by suitably wiring the contacts oi' relays CI-.CIII and C2I-C30 in the multiple iield VL any desired translation of the impulse trains to be transmitted can be brought about. Furthermore separate approaches to the register can be provided in which relays are operated which eilect a plurality of direct markings in the multiple field VL and so bring about the automatic transmission of a plurality of impulse trains. Such an' arrangement can be oi importance for example yfor reaching supervisory positions and the like. The contacts lzl, lz2, lz3 and lzl controlled by the magnets ZI and Zl serve to render partial impulses transmitted when the interrupter Un is connected up, inoperative.

What is claimed is:

1. In an impulse sender which may be seized over any of a plurality of paths, means for generating impulses, discriminating means operated in accordance with the `path over which the sender is seized thereby to prepare one or vmore controlling circuits for said generating means, and means operated step-by-step to complete the prepared controlling circuits successively, said generating means operating under control of each circuit in turn to transmit a train oi impulses.

2. In a register sender which may be seized over any of a plurality of paths, means for generating impulses, discriminating -means operated in accordance with the path j over which the sender is seized thereby to prepare one or more controlling circuits for said generating means. an incoming line. registering means controlled over said incoming line also to prepare one or more controlling circuits for said generating means, and means for completing in a predetermined sequence the circuits prepared both by the discriminating means and by the registering means. said generating means operating to transmit a train of impulses under control of each circuit in turn when that circuit is completed.

3. A register sender as claimed in claim 2, wherein the means for completing the prepared circuits includes a switch having a contact bank in whichthe prepared circuits appear and a wiper operated step-byhstep, said circuits being animee 4. A register sender as claimed in claim 2, wherein the circuits prepared by said discriminating means are completed in turn by the iastnamed means before or during the time the registering means is controlled over the line, those trains of impulses depending upon the path over which the register sender was seized thereby being transmitted independently of the operation of said registering means. 4

5. A register sender adapted to at times transmit impulses depending upon the mode of seizure of the register sender, including means for generating impulses, a plurality of paths over which the register sender may be seized, discriminating means operated in accordance with the path over which the register sender is seized thereby at times to prepare one or more controlling circuits for said generating means and at other times to prevent transmission of any impulses depending upon the mode of seizure of the register sender, an incoming line, registering means controlled over the incoming line also to prepare one or more controlling circuits for said generating means, and means for completing in a predetermined sequence the circuits prepared by the discriminating means, if any, and the circuits prepared by the registering means, said generating means operating to transmit a train of impulses under control of each circuit in turn when that circuit is completed.

6. In an impulse sender which may be seized over anyoi a plurality of paths, two switches, means for completing one or more circuits between the banks of said two switches depending upon the path over which the sender is seized, and an impulse generator operating under control of said two switches, said two switches cooperating during the sending of impulses by said generator to control in accordance with said l completed circuits both the number of trains of impulses sent and the number of impulses in each train.

7. An impulse sender as claimed in claim 6, wherein as many trains of impulses are sent as 5 there are circuits completed between the banksI of said two switches.

8. An impulse sender as claimed in claim 6, wherein as many trains of impulses arev sent as there are circuits completed between the banks i of said two switches, and wherein each circuit determines' the number of impulses in'one train of impulses.

9. In an impulse sender which may be seized over any of a plurality of paths, discriminat- 5 ing means operated in accordance with the path over which the sender is seized, a switch, means for marking the bank of said switch one or more times in succession, the number of times the bank of said switch is so marked depending upon l) the path over which the sender was seized as determined by said ldiscriminating means, and means Acontrolled by said switch for sending successive trains of impulses each dependent in numyber upon one of said markings of the bank oi.

said switch. y y

10. In a register sender which may be seized over anyone oi a plurality of paths, discriminating lmeans operated in accordance with the path over which the register sender is seized, an incoming line, digit registering means controlled overthe incoming line, a switch, means for marking the bank of said switch one or more times in succession depending upon the path over which the register sender was seized and for marking the bank of said switch one or more times in another succession depending upon the digits registered by said registering means, and means controlled by said switch for sending .trains of impulses each dependent in number upon one of said markings. v

11. A register sender as claimed in claim 10, wherein said other succession of markings follow said rst succession.

. 12. An impulse sender having seizing paths of different classes, discriminating means operated in accordance with the class of path over which 'the sender is seized', and an impulse-generator controlled by said last means for transmitting, responsive to seizure of the sender, one, two, or three trains of impulses, the number' of trains of impulses depending upon the class of path over which the sender was seized.

13. An impulse sender adapted to at times transmit impulses depending upon the mode or seizure of the sender, including seizing paths oi different classes, discriminating means in the seizing paths operated to determine the number of trains of said impulses to be transmitted depending upon the mode of seizure, and an impulse generator controlled by said last means at times transmitting, responsive lto seizure of the sender, one, two, or three trains of impulses.

14. .An impulse sender which has seizing paths of different classes and which may be seized over any of a plurality of paths in each of said classes, having primary discriminating means and secondary discriminating means operated in accordance with, respectively, the class of the path over which the sender is seized and the particular path over which the sender is seized, and-means controlled by both the primary and the secondary discriminating means for transmitting trains of impulses, the number of trains of impulsestransmitted depending upon the class of path over which the sender was seized, and the number of impulses in one of the trains depending upon the particular path of that class over which the sender was seized.

HERMANN-ERNST v. KNIG. 

